Get the meaning of the engine P0891 Code and solve the problem from the car engine. You can get the meaning of the code from automobile engine manual and from online, you will get general meaning. The automobile dictionary meaning of the code is general meaning and it is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 8 for Ignition System Or Misfire. 9 for Crankshaft Position Sensor Circuit Performance and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. The powertrain problem of the car engine is easy to fix and it can be fixed without changing any part of the car engine.